Pneumatic wheel.



W. ALEXANDROWSKY.& A.-- SLOBINSKI. PNEUMATIC WHEEL. APPLICATION FILEDDEC. I6, 1911.

r a $1 mm m PNEUMATIC WHEEL.

Application filed December 16, 1911.

To aZZ whom it may concern:

Be it known that we, WLADIMIR ALEXAN- nnowsnx, nobleman, and ANANIUSSLOB- INSKI, citizen, both the subjects of the Emperor of Russia, andresidents of St. Petersburg, Russia, have invented new and usefulImprovements in Pneumatic Wheels, of whichthe following is aspecification.

The shortcomings of the ordinary pneumatic tires and the expense causedthereby to owners of motor vehicles are well known.

The object of our present invention is to produce a pneumatic wheel inwhich the air cushion is so arrangedthat it does not come in contactwith the road, whereby it is protected against rapid wear and againstpunctures, which are the frequent cause of accidents, delays and otherinconveniences.

According to our invention, the air cushion is placed between twoparallel disks spaced apart and secured to the hub of the wheel, whichforms a support for the air cushion. Between the two disks is guided themovable rim, which is held in contact with the air cushion and hassecured to it a solid tire. A second air cushion may be placed betweenthe rim and the tire, where by the shock absorbing quality of the wheelis further increased.

The drawing shows cross-section through part of a wheel made inaccordance with our invention.

Our new wheel consists of three principal parts: The first partcomprises two disks S and P spaced apart andmounted on the bushingsurrounding the axle N and secured together near said axle by means ofbolts L Moreover, the two disks are held together by bolts L, passingthrough lugs A arranged symmetrically along the periphery of both disks.Along their middle portion, 6. be-

tween the center and the periphery, the disks.

are bulged outwardly, as clearly shown. Into the annular chamber thusformed projects the outer end of the air cushion R, provided with theair valve 1. The air cushion R is arranged in the open space between thetwo disks S and P and isseated on the hublike portion G of the disk S.To the latter is fastened a cup-shaped member W, which is held onshoulders F formed on disk S and is secured by bolts K. The part W issup- Specifieation of Letters Patent.

tented-June as, role.

Serial No. 666,157.

posed to receive the brake for the axle N. The second part isrepresented by the metallic rim E which is secured to the outer ends ofthe spokes B, some of which have sockets for receiving the antifrictionmembers, marked X. The innerv ends of the spokes are secured to a ringD, of semicircular cross-section. The rim E,-the spokes-B and the ring Dform practically one piece.

When the air cushion R is fully inflated, it

completely fills the space between the two disks S and P and it bearsfirmly against the ring D. Where the two disks bulge outwardly, a freespace is left, whereby the air cushion is afforded an opportunity toexpand under heavy loads.

The air cushion R bearing against the ring D, supports the weight of thecar and. as the wheel rotates, the two disks can move in a verticaldirection, the friction between the inner walls of the disks and themembers X being reduced by the steel balls, provided in said members onboth sides thereof, as shown. The air cushion being 'loGated between thedisks S. and P and bearing with its outer circumference against the ringD, it will cause the entire second part together with the rim E torotate with it.

Due to the novel construction, the axle is efficiently protected againstshocks, which might cause the axle to break, and the body of the carand, therefore, the motor are not subjected to the heavy jolts, whichoften interfere with the smooth working of the motor. Also the fittingsof the cars are subjected to less rapid wear.

An additional air cushion .R, is secured to the wheel rim E, andprotected by wooden strips 0 which are laid firmly over the air cushionone against the other, so as to forma wooden rim, which is held in placeby specially shaped metallic guards O,al low1ng the wooden strips tomove freely toward the axle in a vertical direction under a load. Thetread surface of each wooden strip G is of convex shape, so that uponwear it"will not interfere with the free relative movement of thestrips.

We claim: 1

In a pneumatic wheel, the combination with the hub, of two spacedparallel disks secured to the hub, an air cushion supported between saiddisks and by said hub, a movanames to this specification in the presenceof ble rim guided by said disks, a movable solid two subscribingWitnesses. tire mounted on said rim and forming the tread, metallicguards secured to said rim ROWSKY' for guiding said solid tire, and asecond air cushion between said rim and said solid tire Witnesses:

and supported by said rim. H. A. LOVIAGUINE,

In testimony whereof, we have signed our A. N. TSCHEMALOFF.

